Stone mastic asphalt with the use of a stabilizing additive from hydrolytic lignin

Abstract

The experience of using hydrolytic lignin in domestic and foreign literature allows us to consider it as a stabilizing additive in the production of crushed stone-mastic asphalt concrete mix. For this purpose it is necessary to conduct laboratory tests of raw materials and asphalt concrete mixtures with different percentage of hydrolytic lignin. On the basis of the obtained results, to draw a conclusion about the use of waste from the hydrolysis industry for the device of the top layers of coatings from rubble-mastic asphalt concrete at construction, reconstruction, overhaul of highways. Stone mastic asphalt (SMA) - artificial road-building material, which is a mixture of mineral materials (rubble, sand from screenings of crushing and mineral filler), oil road bitumen, used as a binder and stabilizing additive used for resistance to delamination and uniformity of SMA. Hydrolytic lignin is a waste of biochemical production of cellulose. Application of hydrolytic lignin as a stabilizing additive for stone-mastic asphalt mixture (SMAS), allows to stabilize the crushed stone-mastic asphalt concrete mix, to increase the adhesion of bitumen to the surface of the mineral material and to improve the physical and mechanical properties of crushed-stone and mastic asphalt concrete. At the present stage of scientific and technological development, economy and rational use of material resources is becoming the main condition for increasing production efficiency. The use of hydrolytic lignin as a stabilizing additive will improve the performance properties of crushed stone-mastic asphalt, as well as reduce the cost of construction, reconstruction and overhaul of highways.